6x^2 + 27x - 4x - 18
3x(2x+9) - 2(2x+9)
(2x+9)(3x-2)
Объяснение:
6x² + 23x - 18 = 0 D = b²-4ac = 529+432 = 961 = 31²
x₁ = (-b+√D)/2a = (-23+31):12 = 2/3
x₂ = (-b-√D)/2a = (-23-31):12 = -4,5
6x² + 23x - 18 = 6(x - 2/3)(x + 4,5) = (3x - 2)(2x + 9)
